Cu–Pt bimetallic shells supported on a double-walled TiO2 nanotube (PMTiNT) array are efficient photocatalysts for the room-temperature conversion of CO2 into light hydrocarbons, such as CH4, C2H4, and C2H6. When Cu0.33–Pt0.67/PMTiNT was used photoreduction diluted (1 % in N2), an average hydrocarbon production rate 3.7 mL g−1 h−1 or 6.1 mmol m−2 realized under AM 1.5 one-sun illumination.

Block copolymer self-assembly is an innovative technology capable of patterning technologically relevant substrates with nanoscale precision for a range applications from integrated circuit fabrication to tissue interfacing, example. In this article, we demonstrate microwave-based method rapidly inducing order in block structures. The technique involves the usage commercial microwave reactor anneal films presence appropriate solvents, and explore effect various parameters over polymer...

Electrochemical anodization has been used to grow vertically oriented nanowall and nanotube arrays in copper sulfide.

Cu-Pt-Dimetallschalen auf der Oberfläche doppelwandiger TiO2-Nanoröhren (PMTiNT) sind effiziente Photokatalysatoren für die Raumtemperatur-Umwandlung von CO2 in leichte Kohlenwasserstoffe wie CH4, C2H4 und C2H6. Mit dem System Cu0.33-Pt0.67/PMTiNT unter AM1.5-Bestrahlung gelang Photoreduktion verdünntem (1 % N2) mit gemittelten Kohlenwasserstoffbildungsgeschwindigkeiten 3.7 mL g−1 h−1 oder 6.1 mmol m−2 h−1. Detailed facts of importance to specialist readers are published as "Supporting...

A series of oxide supported mono-, bi-, and trimetallic nanoparticle catalysts were synthesized screened for catalytic activity the hydrogenation poly-, heteroaromatic substrates. Seventy-two different toluene, naphthalene, pyridine, indole, quinoline, thiophene, benzothiophene under mild conditions; five these seven substrates successfully hydrogenated reaction conditions. Bulk kinetic studies, including temperature pressure performed using select one hydrocarbon (naphthalene)...

Thin films cast from binary blends of structurally homologous polystyrene-block-poly(2-vinylpyridine) polymers were used to obtain horizontal arrays linear nanostructures which visualized by metallizing the poly(2-vinylpyridine) blocks with a tetrachloroplatinate salt. By varying blend compositions block copolymers, fine control over periodicity lines was realized ∼25 55 nm using set just 4 copolymers. For neat copolymers whose equilibrium structures are not cylinders, blending enabled...

Block copolymers can be used to template large arrays of nanopatterns with periodicities equal the characteristic spacing polymer. Here we demonstrate a technique capitalizing on multilayered arrangement cylindrical domains effectively double pattern density templated by given By controlling initial thickness film and solvent annealing conditions, it was possible reproducibly create doubled lines swelling until bilayers horizontal cylinders were obtained. This process also demonstrated...

This study focuses on the application of a simple screening approach to prepare and test heterogeneous mono- bimetallic nanoparticle (NP) catalysts for arene hydrogenation activity under ambient conditions in quick time efficient manner, as well detailed testing characterization identified active catalysts. Over 90 NP supported alumina were efficiently screened using toluene model substrate. Through this approach, four determined be active: RhPt/Al(2)O(3), RuPt/Al(2)O(3), IrPt/Al(2)O(3),...

Silicon surfaces with nanoscale etched patterns were obtained using polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer films as templates, followed by brief immersion in HF(aq). The resulting interfaces comprised of pseudohexagonal arrays pits on the silicon, whose shapes depended upon chosen silicon orientation. top unetched face remains capped native oxide, and pit interiors are terminated Si–Hx. Selective chemical functionalization via these two handles was demonstrated...

In recent years, alkali activation for potassium persulfate (PS) treatment has been proven a promising method in the advanced oxidation processes. However, majority of studies have focused on water pollution control and remediation There are few reports application PS to transform organic solid waste into resource. this study, sugarcane filter cake (SFC) was treated with activated by calcium hydroxide (CH) convert it an fertilizer (CH-PS/SFC) high amounts fulvic-like acid (FLA). CH-PS/SFC...

In this paper, a new fuzzy sliding mode control scheme is proposed for second-order linear time-varying systems in order to obtain faster error convergence and desired dynamics. It well known that system can be used model higher time invariant piece-wise. Therefore, it necessary do deep investigation the stability robustness analysis design of advanced tracking controllers systems. shown divided into two steps. A controller designed first speed up when greater than one. terminal then...

Due to the sea-crossing bridge span is generally large and main pier pile foundations are located in deep water carry vertical load, bearing mechanism load deformation characteristics still vague. Authors studied properties of through pilot tests. Large tonnage test Qingdao Bay Bridge program designed by using per-stressed technique optimize design anchor reaction beam system. Test results show that feasible effective. This method can directly capacity foundations, analysis behaviors from...

The turbine-generator set is a complex control system with nonlinear and strong coupling characteristics. It very important to make sure that the work stably. Reference presented new stability criterion based on numerical computing simulation, which could solve this problem. New Stability Criterion expanded sufficient conditions of Lyapunov's direct method into necessary for local stability. provides standard simple way select energy-like function. Some refinements are made in paper. And...

Uneven settlement of bridge piles in soft soil is usually treated by adding anchored and statically pressed piles. Due to the rebounding newly added after anchors are removed other reasons, bulges or pile uplifts if they were located too closely often develop, which reduces their effects. To solve such problems, axial prestress can be applied during construction. The structure with presented. calculation given discussing reason pressing force increased total length shorter than designed. If...

For the robot force control system, affected by uncertainty of system modeling, unknown environmental parameters, nonlinear time lag and external disturbances, classic schemes such as: hybrid force/position control, impedance are suppressing transient forces overshoot steady-state tracking phases cannot achieve good results. Therefore, this paper proposes an adaptive switching update rate scheme (SAHI) based on above algorithm. The algorithm dynamically changes damping parameters in model...